Response to the following problem:
Key comparative figures for both Research In Motion and Apple follow.
                                                              Research In Motion                        	Apple
                                                              Current         	Prior                  	Current       	Prior
($ millions)                                               	Year             	Year                   	Year         	Year
Revenues (net sales) ...                            $14,953        	$11,065              $42,905    	$37,491
Cost of sales ...                                       	8,369             	5,968                	25,683     	24,294
Required
1. Compute the dollar amount of gross margin and the gross margin ratio for the two years shown for each of these companies.
2. Which company earns more in gross margin for each dollar of net sales? How do they compare to the industry average of 40.0%?
3. Did the gross margin ratio improve or decline for these companies?